Climate of Oslo, Norway

Dfb

Köppen-Geiger climate classification: Dfb — Cold, no dry season, warm summer.

Oslo has a mean annual temperature of 7.1 °C and receives 827 mm of precipitation per year (1991–2020 climate normals). The warmest month is July with a mean temperature of 18.1 °C, while January is the coldest month at -2.6 °C. Most precipitation falls in August (97 mm); the driest month is February (44 mm).

Climate Diagram

Climate diagram for Oslo: monthly mean temperature (red line, left axis, °C) and monthly precipitation (blue bars, right axis, mm), 1991–2020 0 0 10 20 20 40 30 60 40 80 50 100 °C mm J F M A M J J A S O N D

Walter–Lieth diagram: blue bars show monthly precipitation (right axis, mm), the red line shows monthly mean temperature (left axis, °C). Scale: 1 °C ≡ 2 mm.

Climate Table

MonthMean temperature (°C)Precipitation (mm)
January-2.657.1
February-2.243.8
March1.245.6
April6.246.7
May11.755.7
June15.775.5
July18.178.2
August16.996.8
September12.687.1
October6.992.4
November2.387.4
December-1.660.2
Year7.1826.6

Live Forecast

Looking for the current weather instead of climate averages? Open the live forecast diagrams in WZ Diagrams — 15 weather models, ensemble spread, radar and more.

Data Source

Climate normals and Köppen-Geiger classification: Beck et al. (2023), Scientific Data 10, 724, CC BY 4.0. Period 1991–2020. Classification resolution ≈ 1 km; monthly climate data resolution ≈ 1 km (0.01°, Original 2023 release; predates the January 2026 correction), sampled at the grid cell containing the city coordinates (59.91°, 10.75°). Climate normals describe the long-term average, not current weather.